Multiple bolt rim night latch



June 26, 1945. f v|| G. volGHT 2,379,050

` MULTIPLE BOLT R`I MANIGH`T LATCH Filed Deo. 4, 1943 iid,

Patented June 26, 1945 MULTIPLE BOLT RIM NIGHT LATCH Henry G. Voight,Hamden, Conn., assigner to Sargent & Company, New Haven, Conn., acorporation of Connecticut Application December 4, 1943, Serial No.512,848

1-0 Claims.

This invention relates to locks, and While ap-v plicable to other kindsof locks, it is illustrated as applied to a night latch which is adaptedto be operated from one side by a thumb turn and from theother side by akey. Also as illustrated, the improvements are applied to what is termeda rim lock in that, as shown, the lock case is mounted upon the exteriorsurface of the door instead of being mortised in the door, as isfrequently the custom.

In locks or latches of this character the mechanism is usually providedwith a bolt which may be either a dead bolt or latch bolt adapted to beprotracted from the case into engagement with a strike. Some difficultyhas been encountered with such constructions in the past in that theyhave been subject to being jimmied orbeing forced open by a toolinserted between the bolt and strike, and thus forcing the boltrearwardly into the case.

It is contemplated by the present invention to provide a lock whichshall be jimmy proof, in that the bolt operates in such a manner that itcannot be retracted or disengaged from the strike by a tool insertedbetween the bolt and strike at the outside of the door. In accomplishingthis function the lock is so constructed that the bolt member, which isprotracted into engagement with the strike, is not only movedlongitudinally but also swung about a pivot on-a bolt carrier so that itcannot be retracted by a longitudinal movement alone, but there mustalso be imparted to it a reverse swinging movement to free it from thestrike. Moreover, in the present instance a plurality of such swingingbolt members are provided, thus rendering it increasingly difficult tojimmy the lock and thus effect entrance to the door.

One object of the present invention is to provide a door lock whichshall be substantially jimmy proof.

A further object of the invention is to provide a lock of the so-callednight latch type, in which the bolt when projected from the lock casewill be given a swinging movement to embrace, or partially embrace, a.lstrike member whereby it must, upon retraction, undergo a swingingmovement in a reverse direction.

g A still further object of the invention is to provide a rim lock ofthe character described which shall be simple in construction andoperation, and at the same time be proof against being opened by a toolinserted between the lock case and the strike.

To these and other ends the invention consists in the novel features andcombinations of `parts to be hereinafter described andclaimed. l

In the accompanying drawing:

Fig. l is a sectional view of a lock embodying my improvements, showingthe lock as applied to the surface of a door; -I 1 Fig. 2 is a sectionalview of the lock on lline-2-"2- of Fig. l, showing the parts as theyappear with the cover of the lock case removed and the `bolts inprotracted position;

Fig. 3 is a sectional View on line 3-3 of and A Fig. 4 is a fragmentaryhorizontal sectional view similar to Fig; l but showing ther fron-t p0rItion of the lock only, and showing the bolts in' retracted position. l

In illustrating a preferred embodiment vof my invention kI have shown adoor I0 having mounted on the inner surface thereof a -lock'case'I-Iprovided with a cover I 2, the cover being secured in place by means ofa post I3 secured to the-case II and receiving a suitable fasteningmember such as a screw entering through an opening the cover I2. Thecase is provided in its forward end with a plurality of spaced boltopenings I la.'

Cooperating with the lock case is a strike I4' adapted to be mounted onthe door frame. Asv shown, a strikemember I5 is carried by the strike,this member being in the form of a verticallyv dis-J posed bar or rod ofcircular crosssection secured to the member I4 adjacent the front wallthereof. The strike I4, as is usual, is open on thesidej Fie. f2;

toward the lock case II, so as -to receive the boltv or bolts of thelock upon protraction thereof.

Mounted in the lock case is a bolt carrier'l having at its lower cornera rearwardly extending tail portion I'I which is rigid with the carrierand maybe formed integrally therewith, Upon the tail portion I1 ispivoted at I8 a tumbler I9, the tumbler being urged in acounterclockwise direction about its pivot by means of a spring 20, oneend of which is engaged with the tumbler and'the other end lodgedagainst a lug 2| on the portion I1 of the carrier.

The end 22 of this tumbler projects upwardly between talons 23 formed atthe rear end of the tail portion I1 of the bolt carrier, which tail portion is also provided with a longitudinally extending slot 24 in whichis slidably received'a post 25 secured to the lock case I I. The tumblerI9v is provided with a detent 26 normally engaged with" The bolt carrierI6 is provided with a plurality of recesses or slots 28, three innumber, as shown. In each of these slots is mounted a bolt 29, each ofthese bolts being pivoted to a pin 30 secured to the carrier, and theslots 28 are, as shown in Fig. 1, of sufficient extent laterally so asto permit swinging movements of the vbolts about the pivot pin.

As shown more particularly in Figs. 1 and 4, the forward end of each ofthe bolts is hookshaped in form, as at 3l, the inner surface of the endbeing rounded as shown at 32, so that the bolt when protracted maypartiallyembrace the strike member I5. The cooperating surfaces of thestrike member I5 and theY portion 32. of each of the bolts are such thatwhen each of the' bolts is retracted it will, if permitted a swingingmovement, be cammed by these cooperating' surfaces to swing about itspivot so that it` will passVv out of engagement with the strike member.

It` will also benoted that each of the. bolts is provided with atailportion 33 -on the opposite side of its pivot from its forward end 3i,with operated lock structure, as they may be of the usual form wellknown in the art.

It will be seen that when the bolts 29 are protracted as shown in Figs.1 and 2, they cannot be forced rearwardly by a tool inserted between thelock case and the strike as they must .be swung about their pivotsbefore this movement can be eifectedand any such swinging, movement isprevented by they engagement of the tails 33 of the bolts with the rib34, so that the lock may not be jimmied in this manner. When it isdesired to open the door, however, the rollback 36 {gjage the tumbler I9from the detent 25, and

thereafter to engage one of the talons 23 and move the bolt carrier andbolts rearwardly, the

' bolts being disengaged at this time from the strike which tail portionis adapted to cooperate a rib 3,4 formed on the case and of a suicientlength in a vertical direction to engage the tail pieces of all of thebolts.` Thus it will be apparent. that, aszthe bolt carrier is movedforwardly from the position shown in Fig. 4` tothat. shown in Fig` 1,the bolts 29 will be protracted from the. case, and that as theyapproachv theirA extreme protracted positions the tail portions 33 willstrike therib 34,-and, the bolts will be swung about their pivots 30,*tohook over or embrace'the strike rod I5, thus securely locking the doorin` closed position. When the bolt carrier is moved1 rearwardly from theposition shown in Fig. 1, thetail' portions 33 of thebolts will bemovedaway fromthe rib 3G and thusl will permit the. bolts` to-be cammedby the strike member I5 in a reverse direction, thus disengaging: this..strike member and: permitting thebolts to be retracted into the lockYcase, as shownin- Fig. 41.'

. `The bolt carrier maybe operated by'any desired means. As shown,however, a rollback 363 is securedfto-a hub 3-1, rotatably mounted inthel case, to. which hub; is secured. a thumb44 turn 38 at the outsideyofthecasebut on the insideof the door, so that the rollback 36 may befreely rotated by the thurnbturn.` The-rollback is'provided. with a pairof posts 39, oneupon eachend, designed: to enter between thetalons 2,3-,and by engaging the endl22 ofthe tumbler I9 free the detent 26. fromengagementwith the post 25. Afterthisr has beendone continued rotationof thevrollback will cause one of the posts 39 to, engage. one ofthetalons 23'and move the4 bolt carrier Ilia inv the desired" direction,the carrier, of course, bringing the bolts with it. e To maintain therollback 3,6 in a'neutralposi.- tion; as shown 1n Fig. 2, a bar 401ispivoted to the case at 4I, and maintained by a spring 42 in a positionin which its-lower surface bears against the rpostsy 39. When therollback is actuated the bar 40 will, of course, be moved upwardly`about its; pivot; against the tension. *ofA its 'springy `but will bereturned by the spring to the` position shown'in Fig. 2 to, normallyhold; the rollbackin its neutral position. i lAt the outside oftheadoor` there, -mayi'beproa vided a key-operated lockMfhaving apstenr4.51m; non-rotative engagement withthefhub 3T. sothat this hub and therollback` ,36.*v `martha actuatedi from. the outside ,otthefdoor byakey` "Itisinot: deemed'necessary. to. show thefdetailslofi tbisekeyf.

member I5.

While I have shown and described a preferred embodiment of my invention,it will. be understood that it; isA not to be; limited to.. all of the'details shown,Y but is. capable of modification and variation within thespirit of the inventionA and within the scope of the claims.

What'I claim is:

1. In a. door lock, a4 case having a bolt opening, a, bolt carrierslidably mounted in the case, a bolt pivotally carried by saidI carrierto swing about a vertical axis, means, to. reciprocate said carrier to.retract said bolt into the case and protract it. therefrom` through saidopening, and means; in xed position on thecase to.` engage.l said bolt.during; the protraction thereof and effect a swinging movement. of thebolt about its axis, said@ bolt being pivotedy adjacent its rear end. tothe carrier and. extending forwardly from the front edge thereof to.project from the case, while the carrier is retained therein.

2. In a door lock, a case having a bolt opening, a bolt` carrierslidably mountedr irr 'the case, a bolt; pivotally carried, by said`carrier to swing about, a vertical airis,y meansV to reciprocateA saidcarrier to retract, said bolt into. the case andprotractl it therefromthrough said opening, means in iixed position on the case to engage saidbolt during the protraction thereofI and effect a swing ing movement ofthev bolt about its axis, and a. strike member comprising a verticallydisposed bar which saidY bolt embracesA when protracted and.Y swungabout its. pivot, said bolt being pivoted adjacent its rear end to thecarrier and extending forwardly from the front edgethereof to projectfrom the case:` and engage the strike member while the carrier isretained withinthe case;

3. Alock as-'in claim l, whereinz the boltcarrier comprises a relativelywide memberV extending vertically of the case and carries a plurality.'of said pivoted. bolts spacedA along. its width.

4.` fr lock as. in claim l,l wherein the bolt carrier comprises arelatively wide member` extentie. ing vertically of the case-andcarries-.9.. plurality of." said' pivoted. bolts spaced; along,l itswidtbtiu combination. with4 a. strike member comprising. a vertically:disposed bar embraced by said=` bolts when protracted. i

`5. In a, night, latchs, a, oase;l a. bolty carrier slid;` ably mountedin thel case, a plurality.' of bolts pivotally carried by the carrieryandi arranged* in spaced relationl said= case being provided' withopenings-.to permitprotractiom of saidi bolts wheny saidcarrierisgm'ovedf toward-fthe. front offtheA case, each of said bolts, being;provided with' a taillpor tion, and means on the case to engage thetail` portion of each, of the bolts and' swing-the latter about theirpivots when the carrier nears the end of its forward movement.

6. In a night latch, a case, a bolt carrier slidably mounted in thecase, a plurality of bolts pivotally carried by the carrier and arrangedin spaced relation, said case being provided with openings to permitprotraction of said bolts when said carrier is moved toward the front ofthe case, each of said bolts being provided with a tail portion, meanson the case to engage the tail portion of each of the bolts and swingthe latter about their pivots when the carrier nears the end of itsforward movement, and a strike member carrying a vertically disposed barto be embraced y by said bolts when protracted.

each of said bolts being provided with a tail portion, means on the caseto engage the tail portion of each of the bolts and swing the latterabout their pivots when the carrier nears the end of its forwardmovement, a strike member carrying a vertically disposed bar to beembraced by said bolts when protracted7 and means to eiect reversemovement of said bolts about their pivots when the carrier is movedrearwardly to retract the bolts.

8. In a night latch, a case, a bolt carrier slidably mounted in thecase, a plurality of bolts pivotally carried by the carrier and arrangedin spaced relation, said case being provided with openings to permitprotraction of said bolts when said carrier is moved toward the front ofthe case, each of said bolts being provided with a'tail portion, andmeans on the case to engage the tail portion of each of the'bolts andswing the latter about their pivots when the carrier nears the end ofits forward movement, said bolts having hookshaped ends to engageastrike member'.

9. In a night latch, a case, a bolt carrier slidably mounted in thecase, a plurality of bolts pivotally carried by the carrier and arrangedin spaced relation, said case being provided with openings to permitprotraction of said bolts when said carrier is moved toward the front ofthe case, each of said bolts being provided with a tail portion, andmeans on the case to engage the tail portion of each of the bolts andswing the latter about their pivots when the carrier nears the end ofits forward movement, said means comprising a rib extending verticallyalong a wall of the case adjacent the frontportion thereof.

10. In a night latch, a case, a bolt carrier slidably mounted in thecase, a plurality of bolts pivotally carried by the carrier and arrangedin spaced relation, said case being provided with openings to permitprotraction of said bolts when said carrier is moved toward the front ofthe case, each of said bolts being provided with a tail portion, meanson the case to engage the tail portion of each of the bolts and swingthe latter about their pivots when the carrier nears the end of itsforward movement, and a strike member carrying a vertically disposed barto be embraced by said bolts when protracted, said bolts havinghook-shaped ends to embrace said bar when swung about their pivots byengagement of the tail portions thereof with said means, and beingreversely moved about their pivots by engagement with said bar uponretraction of the bolts when the tail portions are disengaged from saidmeans.

HENRY vG. VOIGHT.

